Troubleshooting; Judgment When No Image Is Displayed; Self-Diagnosis Function - Sony FWD-40LX2F Service Manual

2-1. Judgment When No Image is
Displayed
The status in the case where "No image is displayed" is
displayed according to the number of times when the
POWER/STANDBY indicator in the lower-right position
of this unit's front panel blinks in red. Blinking of two to
three times or five times is repeated after several seconds.
Number of blinking times
Two times
Three times
Five times
Front side
FWD-40LX2F
FWD-40LX2X
Section 2

Troubleshooting

Status
An error code is detected from the
panel.
When the sensor temperature
exceeds the allowable value
13 V power supply is detected.
POWER/STANDBY
indicator

2-2. Self-Diagnosis Function

The self-diagnosis function installed in this unit forcibly
shuts down this unit when the items below are detected
(abnormality is generated) or when the allowable value are
exceeded. The detected items and the allowable values are
as described below.
1. Panel error
This monitors the operation abnormality of a panel
inverter. This unit shuts down when the INV_DET signal
input from CN19 on the A board remains high after the
power is turned on.
2. Increase in sensor temperature
This detects the temperature of the A board and power
supply boards (G6 board). This unit shuts down when the
state in which the temperatures below were exceeded is
detected for two seconds or more.
. A board: 76 dC
. Power supply board: 100 dC
3. Abnormality of supply voltage
The DC voltage error detection in the A board is performed.
This unit is shut down when the voltage of 13 V becomes
6.9 V or less after the power is turned on.
The indicator flashes when an abnormal voltage is detected
for approximately 50 seconds. The power may be shut
down before the indicator starts flashing.
2-1